English to French Law/Patents Engineering (general) polytetrafluoroethylene production method

mixing the resulting polytetrafluoroethylene dried with an extrusion aid and extruding the mixture at an extrusion pressure of 9.8 to 24.5 MPa to form a beading.
The break strength of the porous material produced from a stretched beading is increased as the extrusion pressure for forming the beading is increased.
The lubricated resin was paste-extruded at a reduction ratio of 100 : 1 at room temperature through an orifice (2.4 mm diameter, 5 mm land length, 30° entrance angle) into a uniform beading (extrudate).
A stress relaxation time of > 500 s, measured by preparing a 8 inch (20 cm-span) beading by stretching a beading under the conditions of 1.5 inch (3.8 cm) between clamps.